Respuesta :
D. Since the North was able to blockade ports, they prevent the south from exporting cotton, their most valuable product, which crippled the South's economy.
The correct option is D
Thanks to the northern naval power, this could inflict an ever stricter naval blockade of the Confederate ports, the Union gathered the resources and manpower to attack the Confederation from all directions, leading to the fall of Atlanta by William T. Sherman and his march to the sea.